The chalumeau, a precursor to the clarinet, had a cylindrical bore and a limited range.
chalumeau 是单簧管的前身，它有一个圆柱形的孔和有限的音域。
Cylindrical bore
原声例句
202321
英语百科
Bore (wind instruments)
（重定向自Cylindrical bore）
In music, the bore of a wind instrument (including woodwind and brass) is its interior chamber. This defines a flow path through which air travels, which is set into vibration to produce sounds. The shape of the bore has a strong influence on the instrument's timbre.
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